I am currently taking 150mg of Z. I have suffered with depression...

I am currently taking 150mg of Z. I have suffered with depression, anxiety and OCD since 1994. I have been on Celexa, Paxil, Wellbutrin, Effexor XR, Lexapro and Zoloft. The first few months on Z, I thought I felt better. No anger, frustration, suicidal feelings and it was easier to face each new day. However now it seems that I am chasing that feeling. Even with the increases I feel like all the symptoms are returning. The one difference with Z than any of the others is the decreased/non-existent libido. I am so indifferent to this since I am not interested in anything, but it does cause more tension and guilt for me. My family and friends are understanding but I know it is difficult for them to. Maybe at the lower doses it is the miracle that some people need, but it is not my savior. K